Casting | Rôle |
|---|
| J. Robert Oppenheimer | Self (archive footage) |
| Ellen Bradbury Reid | Self - Daughter of Los Alamos Scientist |
| Christopher Nolan | Self - Writer / Director, "Oppenheimer" |
| Jon Else | Self - Filmmaker, "The Day After Trinity" |
| Kai Bird | Self - Co-Author, "American Prometheus" |
| Bill Nye | Self - Science Educator |
| Richard Rhodes | Self - Author, "The Making of the Atomic Bomb" |
| Mareena Robinson Snowden | Self - Nuclear Security Expert |
| Alan B. Carr | Self - Senior Historian, Los Alamos National Laboratory |
| Gregg Herken | Self - Author, "Brotherhood of the Bomb" |
| Jennet Conant | Self - Author, "109 East Palace" |
| David Eisenbach | Self - History Professor, Columbia University |
| Alex Wellerstein | Self - Nuclear Historian |
| Martin J. Sherwin | Self - Co-Author, "American Prometheus" (voice) |
| Michio Kaku | Self - Theoretical Physicist |
| Leslie Groves | Self - Director, Manhattan Project (voice) (archive sound) |
| Charles Oppenheimer | Self - Grandson |
| Robert Christy | Self - Theoretical Physicist (voice) (archive sound) |
| Robert S. Norris | Self - Author, "Racing for the Bomb" |
| Hideko Tamura | Self - Hiroshima Survivor (Age 10) |
| Roy Glauber | Self - Scientist, Manhattan Project (voice) (archive sound) |
| Edward Teller | Self - Theoretical Physicist (archive footage) |
| Eleanor Roosevelt | Self (archive footage) |
| Judy Woodruff | Self (voice) (archive sound) |
| Adolf Hitler | Self (archive footage) |
| Vladimir Poutine | Self (archive footage) |
| 习近平 | Self (archive footage) |
| Albert Einstein | Self (archive footage) |
